a_plutonium writes:
wrote:
In article .com,
Farooq W wrote:

Dan wrote:

Soil and Dirt particles?! Is that a scientific analysis? Contaminated?

Dust and grit I'd reckon, too.

But I know some tree species evolved into a fire resistant bark in order
to live in fire prone regions, so I wonder what chemical it is that
gives them the best fire resistance. Is it potassium and salts?

Probably more to do with the structure of the bark. If it traps a lot
of air in bubbles (porous) or between layers of bark, the air will be
an effective insulator. A tightly rolled newspaper is difficult to
cleanly burn unless you can fan it strongly to burn away the charcoal
and blow away the ash as quickly as it forms, otherwise the powdery ash
smothers the flame. To wit, the Australian paper-bark tree is very fire
resistant, its bark being like a tightly rolled 1000-layer ricepaper
newsprint and contains no flammable resin.

Is a cork tree fireproof?
--
John Savage (my news address is not valid for email)